People think gun laws are safe under President Donald Trump, and that's hurting the gun business.

Shares of Sturm, Ruger & Company plummeted nearly 10 percent on Thursday after the gun maker reported second-quarter sales fell 22 percent from the year-ago quarter when President Barack Obama was in office.

In a press release, Ruger attributed the drop to an unusual spike in demand last year associated with politics. The company said last year's spike was "likely bolstered by the political campaigns for the November 2016 elections."

Democratic presidential candidate Hillary Clinton made gun violence a cornerstone of her campaign. She promised to support a number of gun-control measures, such as expanding background checks, according to her campaign website.